• 한국강구조학회 논문집
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• 제15권4호통권65호
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• pp.467-474
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• 2003

일반적인 합성보는 콘크리트 슬래브와 H형강 철골보 사이에 작용하는 수평전단력을 쉬어코넥터로 긴결하여 휨내력 및 강성을 증가시킨 구조다. H형강대신 U형 철골을 사용하고 그 속에 콘크리트를 채운 새로운 형태의 합성보 시스템이라 할 수 있는 T형 합성보의 구조 특성을 실험에 의해 분석하고, 기존의 합성보 설계이론을 토대로 내력평가를 하는 데 그 목적이 있다. 또한 T형 합성보의 구조설계 및 시공에 필요한 기초자료를 제시하고자 한다.

• 한국강구조학회 논문집
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• 제16권2호통권69호
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• pp.225-233
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• 2004

일반적인 합성보는 콘크리트 슬래브와 H형강 철골보 사이에 작용하는 수평전단력을 쉬어 코넥터로 긴결하여 휨 내력 및 강성을 증가시킨 구조이다. 본 연구에서 제안한 TSC 구조는 H형강 대신 U형 철골을 사용하고 그 속에 콘크리트를 채운 새로운 형태의 합성보 시스템으로 실험을 통하여 구조특성을 평가 분석 하였다. 또한 실험결과를 통해 T형 합성보(이하 TSC 보라 칭함)의 구조설계 및 시공에 필요한 기초 자료를 제시하고자 한다.

• 한국구조물진단유지관리공학회 논문집
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• 제5권4호
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• pp.131-138
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• 2001

In inverted T-shape composite beam examine the structural behavior by experiment According to arrangement, type of stud connector, type of shear connector, reinforcement by welding of stirrup and a close analysis we came to these conclusion. 1) The compare result of bending strength according to arrange type of stud connector : A1-W(stud connector located web)specimen is exceed than A1-F(stud connector located flange). 2) B1-N(using prominence and depression of the web by shear connector) specimen is decrease than A1-W(using stud bolt by shear connector)specimen in bending strength and B2-N(reinforced by welding the stirrup to lower flange)specimen is similar with A2-W specimen. 3) According to reinforced by welding the stirrup to flange, the stiffness and bending strength of the beams are increase. A-scries stirrup comparatively low effective in the increase of strength by welding the stirrup to flange because enough composite effect show by stud connector, but B-series stirrup is comparatively high effective in shear connector effect because shortage of prominence and depression of the web.

• 한국강구조학회 논문집
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• 제18권2호
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• pp.279-288
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• 2006

합성보의 전단연결재는 국내외에서 연구가 진행되어 콘크리트 슬래브와 철골보의 합성율을 개선시킬 수 있는 디테일이 많이 개발되어 사용 중에 있다. 현재 보편적으로 사용되는 스터드는 내력산정의 편이성과 시공성 등이 조합되어 가장 많이 적 용되고 있으나, 철근이나 ㄷ형강 등도 일부 개발되어 적용되고 있다. 본 연구는 합성보 연구의 일부로서 기존에 사용되던 스터드와 동등 이상의 내력과 연성을 확보할 수 있는 전단연결재를 개발하고, 합성보의 시어 커넥터에 대한 구조설계 및 시공에 필요한 기초 자료를 제시한 것이다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall
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• pp.162-169
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• 1999

Intentionally weakened girders near the beam-to-colum connection lead ductile failures at the weakened points prior to potential brittle failure at the connection points subjected to strong earthquake. Recent research investigated cyclic behavior of composite beams with a rectangular web opening and find out ductile failure of such beams due to plastic hinge formation of T-section at the four corners of the rectangular opening. But eventual failures of T-sections are resulted from local buckling of T-section having a narrow stem and a narrow bound of plastic hinge formation. This continuing research proposes double-circular opening instead of rectangular one in ofter to improve energy dissipation capacity as well as composite beam strength, Experimental test of two specimens was carried out and its results are compared with those of nonlinear finite element analyses

• 한국강구조학회 논문집
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• 제20권4호
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• pp.539-548
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• 2008

본 연구는 기존에 발표한 T형 모듈단면 프로파일보의 적용가능성을 확인하기 위해 실험체를 제작하고 전단보강 유무에 따른 휨 및 전단거동을 측정하여 그 결과를 소성이론식과 비교 분석하였다. 모듈단면 프로파일보는 프로파일이 거푸집기능에 추가하여 휨 및 전단저항성능에 기여하고 모듈개념을 통해 성형성능을 향상시킨다. 실험결과 전단보강을 실시한 TS계열 실험체가 전단보강이 없는 T계열 실험체에 비해 우수한 휨저항 능력을 나타내 사용된 전단보강재는 적절하게 전단력을 분담하고 있는 것으로 파악되었으나 T1-1실험체를 제외한 모든 실험체에서 볼트의 전단파괴에 의한 모듈간 슬립현상이 발생되어 휨저항 성능이 충분히 발휘되지 못한 것으로 판단된다. 추후 전단연결재를 변수로 한 T형 모듈단면 프로파일보에 관한 연구를 통해 적절한 모듈간 접합방법이 연구 되어져야 할 것으로 판단된다.

• Steel and Composite Structures
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• 제14권2호
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• pp.105-120
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• 2013

Flexural behavior of thin walled steel-concrete composite sections as cross sections for beams is investigated by conducting an experimental study supported by applicable analytical predictions. The experimental study consists of testing up to failure, simply supported beams of effective span 1440 mm under two point loading. The test specimens consisted of composite box and channel (with lip placed on tension side and compression side) sections, the behavior of which was compared with companion empty sections. To understand the role of shear connectors in developing the composite action, some of the composite sections were provided with novel simple bar type and conventional bolt type shear connectors in the shear zone of beams. Two RCC beams having equivalent ultimate moment carrying capacities as that of composite channel and box sections were also considered in the study. The study showed that the strength to weight ratio of composite beams is much higher than RCC beams and ductility index is also more than RCC and empty beams. The analytical predictions were found to compare fairly well with the experimental results, thereby validating the applicability of rigid plastic theory to cold-formed steel concrete composite beams.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.499-504
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• 2003

Future bridge decks must have high load-resistance capacity as well as fatigue strength to withstand the increase in traffic loading and the increase in span length between girders due to the decrease in the number of main girders. Steel-concrete composite bridge decks may be proper deck types to satisfy such requirements. To promote the application of composite bridge decks, a rational process to predict and evaluate the fatigue behavior of steel concrete composite bridge deck is required. Various types of steel-concrete composite bridge decks have been developed in many countries. In this study, combining advantages of the existing composite deck types, a new type of composite bridge deck is proposed. An experimental study is performed to examine the fatigue behavior of the proposed composite bridge deck. This composite bridge deck consists of corrugated steel sheet, welded T-beams, stud-type shear connectors and reinforced concrete filler. The fatigue tests are conducted under four-point bending test with three different stress ranges in constant amplitude. The fatigue category of the fillet welding between corrugated steel sheet and the T-beam is evaluated based on the S-N data obtained from the experiment.

• KIEAE Journal
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• 제11권1호
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• pp.9-14
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• 2011

Currently, the multi-residential apartments used in Korea are mostly bearing wall apartments which don't satisfy consumers for the lack of architectural plan flexibility. And due to remodelling-incompatible, bearing wall apartments have to be reconstructed. It is, thus, necessary to develop multi-residential apartments utilizing composite beam that can replace the conventional bearing wall-type apartment buildings. Composite beams proposed in this paper ensure modification of space and quality control, while the floor heights are maintained at the same floor height as in bearing wall structures. This study analyzes the experimental behavior of composite beams with proper combination of structural steel, reinforced concrete, and precast concrete. By comparing with the theoretical analysis and experimental results, the accuracy of flexural moment capacity and neutral axis was evaluated. The experiments were performed by two simply-supported specimens using loading and unloading. When the analysis results were compared with the experimental results, the flexural moment capacity of the composite beam was shown with an error of approximately -0.5 to 0.1% at the maximum load limit state.

• Steel and Composite Structures
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• 제21권1호
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• pp.177-194
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• 2016

The cable-supported ribbed beam composite slab structure (CBS) is a new type of pre-stressed hybrid structure. The standard construction method of CBS including five steps and two key phases are proposed in this paper. The theoretical analysis and experimental research on a 1:5 scaled model were carried out. First, the tensioning construction method based on deformation control was applied to pre-stress the cables. The research results indicate that the actual tensile force applied to the cable is slightly larger than the theoretical value, and the error is about 6.8%. Subsequently, three support dismantling schemes are discussed. Scheme one indicates that each span of CBS has certain level of mechanical independence such that the construction of a span is not significantly affected by the adjacent spans. It is shown that dismantling from the middle to the ends is an optimal support dismantling method. The experimental research also indicates that by using this method, the CBS behaves identically with the numerical analysis results during the construction and service.